From 48246191f80b3cfbc5a966689a3b427d7f7c5c70 Mon Sep 17 00:00:00 2001
From: Dmitry Voronin <hi@voronind.com>
Date: Tue, 22 Oct 2024 11:21:28 +0300
Subject: [PATCH] Nix: Add prefetch function.

---
 home/program/bash/module/Nix.nix | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/home/program/bash/module/Nix.nix b/home/program/bash/module/Nix.nix
index e6fa0ec..31424bb 100644
--- a/home/program/bash/module/Nix.nix
+++ b/home/program/bash/module/Nix.nix
@@ -47,5 +47,18 @@
 
       SHELL_NAME="''${pkg}" NIXPKGS_ALLOW_UNFREE=1 nix shell --impure github:NixOS/nixpkgs/''${rev}#''${pkg} -c ''${cmd}
     }
+
+    # Prefetch to nix store.
+    # Usage: prefetch <URL>
+    function prefetch() {
+      local url="''${1}"
+
+      if [[ "''${url}" = "" ]]; then
+        help prefetch
+        return 2
+      fi
+
+      nix hash to-sri --type sha256 $(nix-prefetch-url "''${url}")
+    }
   '';
 }